7/15/2007 If Sengir Vampire deals nonlethal damage to a creature and then a different effect or damage source causes that creature to be put into a graveyard later in the turn, Sengir Vampire¡¯s ability will trigger and it will get a +1/+1 counter.

9/22/2011 Each time a creature is put into a graveyard from the battlefield, check whether Sengir Vampire had dealt any damage to it at any time during that turn. If so, Sengir Vampire¡¯s ability will trigger. It doesn¡¯t matter who controlled the creature or whose graveyard it was put into.

9/22/2011 If Sengir Vampire and a creature it dealt damage to are both put into a graveyard at the same time, Sengir Vampire¡¯s ability will trigger, but it will do nothing when it resolves.